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* Acquiring Innovation Under Information Frictions
* Murat Alp Celik, Xu Tian, and Wenyu Wang (2021)
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a. The f90 files can be compiled using Intel Fortran Compiler/gFortran. 

   1.	solution.f90 contains all the algorithms that are used to solve for the stationary general equilibrium of the economy, to simulate a panel of firms, to
   construct the model counterparts of targeted moments and other quantities of interest (e.g., the levels of output, consumption, etc.), and to conduct quantitative decompositions.
   2.	parameters.f90 defines parameter values and flag variables.
   3.	globals.f90 defines global variables.
   4.	tools.f90 contains a library of various useful functions that are employed to conduct the necessary calculations. See the comments for each function for attribution and details.
   5.	mod_sa.f90 contains the simulated annealing algorithm used in the estimation. See the end of the file for attribution and details.
   6.	main.f90 contains the main program that calls the other modules and subroutines as necessary, and is used in estimation.
 
b. See the Internet Appendix for more details about the computational algorithm and estimation procedures. 

c. All code produced by the authors is provided under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license. See
   the details of what this license entails at https://creativecommons.org/licenses/by-nc-nd/4.0/
